Puma Engine Whooshing Sound When Revving?

[RoadWarrior]

[youtube]https://www.youtube.com/watch?v=CZ1q3fhihCE[/youtube]]

At 0:22 in the above video, when he lets off the rev, you can hear a whooshing noise, like it has an aftermarket air filter. Is that normal, as my Puma has never done it?

 

[CherryVimto]

May be due to the sound quality but I didn't hear any 'whooshing' noises......

Was it windy when that was recorded? Sounds like there's a low noise that sounds a bit... weird... but like I said, it may just be the sound quality. :?

 

[RoadWarrior]

When he revs the engine, there's like an induction noise that you get when you have a open panel filter on, but this car has its stock air filter on. And it makes the same noise as an induction filter.

 

[Sylvester]

My Puma had exactly the same. The flex pipe got a tiny hole somewhere, in a few month it will suddenly blow and you'll be left with the sound of a 50cc 2 stroke moped.